linux-kernel - Re: [tip:perf/core] perf/x86/intel/P4: Robistify P4 PMU types

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Message-ID: <20130426161328.GA16818@pd.tnic>
Date:	Fri, 26 Apr 2013 18:13:28 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	mingo@...nel.org
Cc:	hpa@...or.com, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org, a.p.zijlstra@...llo.nl,
	tytso@....edu, gorcunov@...il.com, davem@...emloft.net,
	fweisbec@...il.com, oleg@...hat.com, tglx@...utronix.de,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:perf/core] perf/x86/intel/P4: Robistify P4 PMU types

On Fri, Apr 26, 2013 at 07:20:46AM -0700, tip-bot for Ingo Molnar wrote:
> Commit-ID:  5ac2b5c2721501a8f5c5e1cd4116cbc31ace6886
> Gitweb:     http://git.kernel.org/tip/5ac2b5c2721501a8f5c5e1cd4116cbc31ace6886
> Author:     Ingo Molnar <mingo@...nel.org>
> AuthorDate: Wed, 24 Apr 2013 09:26:30 +0200
> Committer:  Ingo Molnar <mingo@...nel.org>
> CommitDate: Fri, 26 Apr 2013 09:31:41 +0200
> 
> perf/x86/intel/P4: Robistify P4 PMU types
> 
> Linus found, while extending integer type extension checks in the
> sparse static code checker, various fragile patterns of mixed
> signed/unsigned  64-bit/32-bit integer use in perf_events_p4.c.
> 
> The relevant hardware register ABI is 64 bit wide on 32-bit
> kernels as  well, so clean it all up a bit, remove unnecessary
> casts, and make sure we  use 64-bit unsigned integers in these
> places.
> 
> [ Unfortunately this patch was not tested on real P4 hardware,
>   those are pretty rare already. If this patch causes any
>   problems on P4 hardware then please holler ... ]

I have a P4 and I turn it on from time to time when it's cold in the
room :-).

Any particular tests you want me to run on it?

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 2
model name      : Intel(R) Pentium(R) 4 CPU 2.60GHz

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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